VNA concepts and features
R&S
®
ZNL/ZNLE
238
User Manual 1178.5966.02 ─ 19
●
When exporting traces to a file, it is recommended to set the analyzer to single
sweep mode ([Sweep] > ""Sweep Control"" > "All Channels on Hold"). This mode
ensures that a complete sweep is exported.
●
The number of decimal places of stimulus and data values in export files is configu-
rable.
9.4.2.1
Touchstone files
The Touchstone file format is a standard for the transfer of frequency-dependent net-
work data. Based on information from Agilent Corporation (the originator of Touch-
stone), formal specifications were produced by the EIA/IBIS Open Forum.
●
Touchstone File Format Specification Rev 1.1
●
Touchstone File Format Specification Version 2.0
The R&S
ZNL/ZNLE supports Touchstone file versions 1.1 and 2.0.
By convention, Touchstone files use file extensions
.snp
, where
n
is the number of
network ports. The following displays an
s1p
export file in "Version 1.1 (ZNx)" format:
# HZ S RI R 50.00
! Rohde & Schwarz Vector Network Analyzer
! Rohde-Schwarz,ZNL6-2Port,1323001206100005,1.37
! Created: UTC 12/24/2020, 5:20:26 PM
! My Comment
! freq[Hz] re:S11 im:S11
5.000000000000000E3 -4.609351754188538E-1 4.146673157811165E-2
3.000497500000000E7 -4.751487076282501E-1 3.597813099622726E-2
6.000495000000000E7 -5.026257038116455E-1 4.391665756702423E-2
...
1
3
4
5
2
6
1 = Option line
2 = VNA identification comment
3 = Timestamp comment
4 = User-defined comment
5 = Network data table header comment
6 = network data table
General syntax rules
Among others, the following general syntax rules apply:
●
Touchstone files are ASCII files, 8-bit encoded using ISO/IEC 8859-1:1998. Only
the graphical characters 0x20 to 0x7E, the tab character 0x09, and the three line
termination sequences LF (0x0A), CR+LF (0x0D + 0x0A), and CR (0x0Dh) are
allowed.
●
Touchstone files are case-insensitive.
●
Blank lines are permitted.
Option line
Each Touchstone file must contain an option line with the following structure:
Operations on traces